A certain manufacturer produces two products, P and Q. Each unit of product P requires in its production 20 units of raw material A and 10 units of raw material B. Each unit of product Q in its production requires 30 units of raw material A and 50 units of raw material B. There is a limited supply of 1200 units of raw material A and 950 units of raw material B. How many units of product P and Q can be produced if we are to exhaust the supply of raw materials?
a) 30 units of P, 20 units of Q
b) 40 units of P, 15 units of Q
c) 35 units of P, 25 units of Q
d) 25 units of P, 35 units of Q